Two-piece construction, non-magnetic gray metal, unmarked, 51.3 mm x 64 mm, contact marks and surface wear, very fine. The Nationale Jeugdstorm (NJS) was a Dutch youth organization established in 1930s and active during the Second World War. This movement was inspired by the German Hitler Youth, and played a similar political/social role, but on a much smaller scale.
Footnote: From the collection of approximately 900 German buckles accumulated by John R. Angolia, who start collecting buckles, belts and brocades from 1944 until around 1990; most of the buckles were obtained from the American and German veterans; most of these buckles present a core of Angolia’s book “Belt Buckles & Brocades of the Third Reich”, published in 2001. A similar buckle is illustrated on page 305 of "Belt Buckles & Brocades of the Third Reich, Revised Edition" by John R. Angolia and came from his personal collection.